Abstract
Objective To apply a non-invasive and feasible method for the quantification of local wall shear stress (WSS) in vivo using magnetic resonance imaging. Methods The fight common carotid artery of a young healthy male volunteer was examined using cine phase-contrast MR sequence. The cross- sectional area, average flow velocity, maximum velocity and flow rate were obtained. Three dimensional paraboloid model was applied to measure WSS value at common carotid artery. Results The mean/peak WSS was (0.75±0.41)N/m2 for the common carotid artery; The mean (range) velocity was (23.4± 12.0) cm/s; The mean (range) luminal vessel area was (32.2±2.9) mm2; The blood flow rate was (7.8±4. 6) ml/s; Conclusion WSS's magnitude, distribution and changes can be determined by MR imaging combining with the three-dimensional paraboloid method. Key words: Magnetic resonance imaging; Carotid arteries
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